Daylight developing apparatus.



No. 793,435. x

- PATENTED JUNE 27, 1905.

A. 0. & DJ. GRAF. DAYLIGHT DEVELOPING APPARATUS.

APPLIOATION FILED 00124, 1904.

2 SHEETS-SHEET 1.

INVENTORS 4 TTORNEYS No. 793,435. PATENTED JUNE 27, 1905.

A. 0. & D. GRAF.

DAYLIGHT DEVELOPINGAPPARATUS.

APPLICATION FILED OCT. 24, 1904;

'2 SHEETS-BHEET 2.

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E ans v dalf (Zz'af A V flam'cl amz W Ana/Mrs UNITED STATES Patented June 27, 1905.

PATENT OFFICE.

ADOLF O. GRAF AND DANIEL GRAF, OF NEW YORK, N. Y.

DAYLIGHT DEVELOPING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 793,435, dated June 27, 1905.

Application filed October 24. 1904. Serial No. 229,791.

To all whom, it may concern.-

Be it known that we, ADOLF O. GRAE and DANIEL GRAE, citizens of the United States, and residents of the city of New York, borough of the Bronx, in the county and State of New York, have invented a new and Improved Dayforming a part of this specification, in which, similar characters of reference Indicate corresponding parts in all the views.

Figure 1 is a perspective View of the photographic-plate-transferring device, the slide being partly withdrawn. Fig. 2 is a perspective view of the developing-tray. Fig. 3 is a transverse section of the tray and the transferring device in position thereon; and Figs.

4, 5, and 6 are longitudinal sectional elevations of the improvement, illustrating the several steps in the use of the apparatus.

An ordinary single or double plate holder A, provided with a slide A and containing the exposed photographic plate or plates B B, is adapted to be slipped into position on a transferring device C, arranged to receive the plate B or B from the plate-holder A, and after the latters removal from the transferring device the latter is engaged or fitted onto a developing-tray D, into which the exposed photographic plate is transferred from the transferring device C to allow of successively developing, washing, and fixing the photographic plate without requiring the removal of the same from the tray and without danger of the plate becoming light-struck during the transferring, developing, washing, and fixing operations.

The transferring device 0 is in the form of a box-like structure having a guideway C for the reception of the plate-holder A, and on the sides of the said transferring device C are arranged spring-catches E for securely holding the plate-holder A temporarily in po sition on the transferring device C, as plainly illustrated in Figs. 4 and 5. In the transferring device C are also arranged guideways C for a slide F, serving to close or open a chamber C formed in the transferring device G, the said chamber being adapted to receive the photographic plate B or B from the plateholder A, as hereinafter more fully described. The top of the chamber C is provided with a translucent pane G to prevent the passage of non-actinic rays of light into the chamber during the developing process, as hereinafter more fully explained, and the said pane G is normally covered by a cover H, hinged to the top of the transferring deviceCand normally locked in place by a suitable manually-operated catch H. The transferring device 0 is also provided with guideways (J for the reception of flanges D, formed on the sides and on one end of the tray D, the other end of said tray being provided with an upwardlyturned flange D adapted to abut against the outer end of the transferring device C whenever the tray and the transferring device are assembled, as indicated in Fig. 6. The transferring-tray D is provided with a bottom D",

having a plurality of perforations D, and a distance above the said bottom D is arranged a false bottom D having perforations D out of alinement with the perforations D" to prevent light from passing by way of the perforations to the inside of the tray D.

The apparatus is used as follows: After the plate B in the plate-holder A has been exposed in the usual manner while in the camera the plate-holder A after its removal from the camera and with the slide A closed is slipped in position on the transferring device C, as plainly indicated in Fig. 4:, the transferring device being in reversed position. The operator now draws out the slide A for the plate B and then gives aslight jerk in a lengthwise direction, so that the plate B becomes dislodged from the plate-holder A and falls down onto the slide Fof the transferring device C.

Then the operator replaces the slide A and withdraws the slide F, so that the plate B falls into the chamber C". (See dotted lines in Fig. 5.) When this has been done, the slide F is replaced, and then the plate-holder A is removed from the transferring device C, and the latter is now turned upside down and connected with the tray 1), so that the flanges 1) thereof engage the guideways O on the transferring device, as plainly indicated in Figs. 3 and 6. The operator now places the lower portion of the tray l) in the developingbath contained in a tray 1 or other suitable vessel and draws the slide F, so that the plate 13 falls down into the developingtray that is, rests with the non-coated side on the false bottom I). The liquid contained in the tray I readily passes through the perforations D' and 1) into the interior of the tray 1) and in contact with the coated side of the plate B, and the operator by properly manipulating the transferring device C and the tray 1), attached thereto, can readily cause the liquid to flow over the coated surface to properly de velop the plate. During this operation the operator may unlock the cover H and swing the latter into an open position to permit the operator to view the developing of the plate through the pane G in the top of the transferring device C. \Vhen the plate has been properly developed, the operator slightly raises the transferring device (I, so as to raise the lower portion of the tray D out of the liquid contained in the tray I to allow this liqquid to drain out of the tray by way of the perforations D and D. V hen this has been done, the entire device is lifted over into a second tray containing a washing liquid, and the lower portion of the tray 1) is immersed in this liquid to allow the same to pass into the tray to Wash the plate. After the washing is completed the device is lifted to allow the washing liquid to drain out of the tray, and then the entire device is taken to a third tray containing the fixing liquid, which is allowed to pass into the tray by way of the perforations to fix the plate. After this has been done the entire device is lifted out of the tray for the fixing liquid to drain out of the tray, and then the tray is disconnected from the transferring device C, and the plate is removed for drying on the usual rack or other device. It is not absolutely necessary that the plate B be transferred from the holder A onto the slide F, as above described, and shown in Fig. 5, as it is evident that both slides A and F may be removed for the plate to drop at once into the chamber C and when this has been done it is only necessary to return the slide F to close the chamber C to shield the plate against light while removing the plate-holder A from the transferring device C.

From the foregoing it will be seen that during the several manipulations the photographic plate is completely shielded against the action of light and is thus not liable to be light-struck, and the operator is enabled to properly develop, wash, and ii): the plate without the slightest danger of the plate becoming light-struck during the several operations.

By the use of the apparatus described a photographic plate can be readily developed, washed, and fixed in broad daylight and without resorting to the use of a dark room.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. A developing apparatus provided with a transferring device having a slide-controlled chamber, and guideways, one for the reception of a photographic-plate holder and the other for engagement with a developing-tray.

2. A developing apparatus having a tray formed withinlets in its lower portion, to allow a developing liquid, washing liquid or fixing liquid to pass in or out of the tray, and a transferring device having guideu ays in which the tray has sliding movement, the transferring device forming a cover for the tray and arranged to permit of transferring the photographic plate to the tray.

3. A developingapparatus provided with a transferring device having guideways for the reception of a photographic-plate holder, spring-catches carried by the transferring device for holding the plate-holder in position the said device havinga slide-controlled ehalnher for the reception of the plate from the said holder, the chamber being provided on its top with a translucent non-actinic-light pane, and a cover hinged on the device, for covering the said pane.

4%. A developing apparatus provided with a developing-tray having flanges formed on the sides and ends thereof, the said tray having a perforate bottom and a perforate false bottom.

5. A developing apparatus provided with a developing tray having horizontal flanges formed on the sides and ends, the flange at one end terminating in an upwardly-tnrned portion, the said tray having a perforate bottom and a perforate false bottom, the perforations in the said bottoms being out of register.

6. In a developing apparatus, the combina' tion with a tray having inlets in its bottom, and provided with flanges at its upper edge, of a transferring device having guideways for the reception of the flanges of the tray, the said transferring device forming a light-proof coverfor the tray, the transferring device having means for holding an exposed plate and for allowing the plate to drop into the tray.

7. In adeveloping apparatus, the combination with a tray having inlets in its bottom, and provided with horizontal flanges at its sides and one end, and an upwardly-turned flange at the other end, of a transferring device forming a light-proof cover for the said tray and having guideways for the flanges of the tray, the upwardly-turned flange on the tray being arranged to abutagainst the outer end of the transferring device when the parts are assembled, the said transferring device having a slide-controlled chamber for the reception of a photographic plate, and a removable slide interposed between the top of the tray and the chamber, to permit the plate to drop into the tray on withdrawing the slide.

8. In a developing apparatus, the combination with a plate-holder, of a transferring device having guideways for the reception of the plate-holder, spring-catches on the sides of the transferring device for holding the plateholder in position, a chamber formed in the transferring device, and a slide for. opening and closing the chamber, the slide being intermediate the plate-holder guideways and the chamber.

9. A developing apparatus comprising a tray having inlets in its lower portion and ar-' ranged to be placed in a developing, washing or fixing bath, and a transferring device having a slide-controlled chamber, the saidtransferring device being provided with guideways for the reception of a plate-holder and guideways in which the said tray has sliding movement.

10. A developing apparatus provided with a transferring device having guideways for the reception of a plate-holder, and guideways at the base of the first-named guideways, eX- tending at right angles thereto, and arranged for engagement with the flanges of a developing-tray.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ADOLF o; GRAF. DANIEL GRAF.

Witnesses:

ARTHUR B. OLANDER, HENRY DIETRTCH. 

